53355681 has 24 divisors (see below), whose sum is σ = 80038400. Its totient is φ = 34250040.

The previous prime is 53355671. The next prime is 53355689. The reversal of 53355681 is 18655335.

It is not a de Polignac number, because 53355681 - 2²³ = 44967073 is a prime.

It is a super-2 number, since 2×53355681² = 5693657389947522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53355689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 268020 + ... + 268218.

Almost surely, 2^53355681 is an apocalyptic number.

It is an amenable number.

53355681 is a deficient number, since it is larger than the sum of its proper divisors (26682719).

53355681 is an equidigital number, since it uses as much as digits as its factorization.

53355681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 233 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 53355681 is about 7304.4973132995. The cubic root of 53355681 is about 376.4669791096.

The spelling of 53355681 in words is "fifty-three million, three hundred fifty-five thousand, six hundred eighty-one".